Natural color change Alexandrite(.38ct, Type2 SI,Ceylon) hand set in a classic Phoenix Fine Jewelry Designs sterling silver ring setting. More rare then diamonds(diamonds are actually very common & plentiful), considered by most to be of the 10 rarest gemstones on the planet, natural Alexandrite has the ability to change colors depending on the light source. Alexandrite is the rare, phenomenal, color-change variety of the chrysoberyl mineral, along with its cousins yellowish transparent chrysoberyl and chatoyant or cat's-eye chrysoberyl. Alexandrite's rarity is a result of its chemical makeup; alexandrite can only form when aluminum and beryllium combine with trace elements like iron, titanium and, most importantly, chromium--which causes alexandrite's color change and is very rarely found in nature. The unlikelihood of the rare element chromium being in the right place to combine with aluminum and beryllium under exactly the right conditions to create alexandrite is what makes it so rare and valuable.Green in sunlight, light purple in incandescent light. Discovered in 1830 and a member of the chrysoberyl family of gemstones, it has been coveted by the great Czar's of Russia and named in honor of Czar Alexander II. With a 8.5 MOHs hardness it is a sturdy stone for rings. This would make a lovely engagement ring. Can be precious metal wrapped ask for pricing. Please ask questionsEstimated retail value $370 Certification available $65 (This is at my cost)g63,RcmdId ViewItemDescV4,RlogId p4%60bo7%60jtb9%3Feog4d71f%2B%3Eg63-14a67333990-0x105-->